diff --git a/everything-app/masto.yaml b/everything-app/masto.yaml
index ce964df..9ded482 100644
--- a/everything-app/masto.yaml
+++ b/everything-app/masto.yaml
@@ -44,7 +44,7 @@ spec:
             type: emptyDir
           postgresql:
             host: masto-postgres
-            existingSecret: true
+            existingSecret: "true"
             secretName: "masto.masto-postgres.credentials.postgresql.acid.zalan.do"
             auth:
               username: "externalSecret"